Browsing Japanese translation

542.

You can access \application{NetworkManager} by using its icon found in the top panel. This icon may look different depending on your current connection state. Clicking this icon will reveal a list of available network connections. The current connection (if any) will have the word ``disconnect'' underneath it. You can click on ``disconnect'' to manually disconnect from that network.

543.

This menu also allows you to view technical details about your current connection or edit all connection settings. \marginscreenshot{03-active-connection.png}{ss:active-connection}{Here you can see the currently active connection is ``Wired connection 1.''} In the image to the right, you will see a check mark next to ``Enable Networking.'' Deselect ``Enable Networking'' to disable all network connections. Select ``Enable Networking'' to enable networking again. This can be very useful when you are required to turn off all wireless communications, like in an airplane.

544.

Establishing a wired connection

545.

If you are already online at this point as indicated by the NetworkManager icon in the top panel showing a connection, then you may have successfully connected during the Ubuntu setup process. You can also simply open a browser and see if you have access to the Internet. If so, you do not need to do anything for the rest of this section. If not, then continue reading.

546.

If you have an \emph{Ethernet} cable running from a wall socket or networking device, such as a switch or router, then you will want to setup a wired connection in Ubuntu.

547.

In order to connect to the Internet with a wired connection, you need to know whether your network supports \gls{DHCP} \emph{(Dynamic Host Configuration Protocol)}. \acronym{DHCP} is a way for your computer to automatically be configured to access your network and/or Internet connection. \acronym{DHCP} is usually automatically configured on your router. This is usually the quickest and easiest way of establishing a connection to the Internet. If you are unsure whether your router is setup to use \acronym{DHCP}, you may wish to contact your \gls{ISP}'s \emph{(Internet Service Provider)} customer service line to check. If your router isn't configured to use \acronym{DHCP} then they will also be able to tell you what configuration settings you need in order to get online.

548.

Automatic connections with DHCP

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This window displays your \acronym{IP} address and other connection information.

550.

If your network supports \acronym{DHCP}, then you may already be set up for online access. To check this, click on the NetworkManager icon. There should be an ``Ethernet Network'' heading in the menu. If ``Wired connection~1'' appears directly underneath, then your machine is currently connected and probably setup for \acronym{DHCP}. If ``Disconnected'' appears in gray underneath the wired network section, look below to see if an option labeled ``Wired connection 1'' appears in the list. If so, click on it to attempt to establish a wired connection.

551.

\marginnote{An \acronym{IP} (Internet Protocol) address is a unique number assigned to your machine so that your router can identify you on the network. Think of it like a phone number for your computer. Having this unique address allows the router to speak to your computer, and therefore send/receive data. If you are still not online after following these steps, you may need to try setting up your network connection manually using a static \acronym{IP} address.} To check if you are online, click on the NetworkManager icon in the top panel and select the Connection Information option. You should see a window showing details of your connection. If your \acronym{IP} address is displayed as 0.0.0.0 or starts with 169.254, then your computer was not successfully assigned connection information through \acronym{DHCP}. If it shows another address (\eg, 192.168.219.133), then it is likely that your \acronym{DHCP} connection to the router was successful. To test your Internet connection, you may want to open the Firefox web browser to try loading a web page. More information on using Firefox can be found later in this chapter.